JP3407573B2 - Vehicle lighting - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing having an engagement groove formed along an opening edge of a front opening and opening substantially in the same direction as the front opening. A vehicular lamp held by the housing such that a lens having a leg protruding from the engagement groove in contact with the sealing material filled in the engagement groove closes the front opening. About. 2. Description of the Related Art Conventionally, for example, as shown in FIG. 4A, a housing 1 having a front opening 1a, a lens 2 mounted on the housing 1 so as to close the front opening 1a, and A vehicular lamp 5 including a bulb 3 mounted on a housing 1 and an inner housing 4 having a reflection surface 4a for reflecting an illumination light beam emitted from the bulb 3 toward the lens 2 is known. The housing 1 has an engaging groove 1b formed along the opening edge of the front opening 1a and opening substantially in the same direction as the front opening 1a. The engaging groove 1b is formed of a hot-melt material or the like. The sealing material 6 is filled. The lens 2 has, for example, a curved surface extending from the front or rear surface of the vehicle body to the side surface.
A leg 2a is provided to be engaged with the engagement groove 1b in a state where the leg 2a is in contact therewith. The inner housing 4 is held by the housing 1. Apart from the above-mentioned reflecting surface 4a, the reflecting surface 4 on the design opposes the part of the lens 2 wrapping around the vehicle body.
The skirt portion 4c having the letter "b" is integrally formed. Since the skirt portion 4c is formed for the design of the entire vehicle body since the portion of the lens 2 that goes around the vehicle body does not guide the illumination light flux as a substantial lamp, the lens 2 is used. It is provided so as not to impair the sense of unity when watermarking. In addition, one end 4d of the skirt 4c
Is bent toward the lens 2 side. [0006] Incidentally, in the vehicle lamp 5 configured as described above, particularly when the lens 2 is exposed when the bulb 3 is turned off, FIG.
As shown by arrows P1 and P2 in (B), there is a problem that not only the sealing material 6 is seen but also it looks dark as a whole. The engaging groove 1b is filled with the sealing material 6. However, this filling operation must be performed in a state where the inner housing 4 is mounted on the housing 1, that is, in a step before mounting the lens 2. In order for a sealing material filling nozzle (not shown) to face the engagement groove 1b, one end 4d of the skirt portion 4c must be retracted from the engagement groove 1b. It could not be used as a member. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and not only makes a sealing material difficult to see, but also can eliminate the overall darkness and provide a vehicle having a glossy feeling. It is an object to provide a lighting fixture. In order to achieve the above object, according to the first aspect of the present invention, an engaging groove which opens along the opening edge of the front opening and substantially in the same direction as the front opening is provided. A vehicle formed in a housing and held by the housing so as to close a front opening with a lens having a leg protruding from a leg that engages with the engagement groove in contact with the seal material filled in the engagement groove. In the lighting device, the lamp extends in a direction intersecting with the leg so as to cover the sealing material located outside the leg , and the tip thereof has three ends.
The gist of the present invention is that a blind ridge having total reflection characteristics is formed on a lens by forming a prism . Next, an embodiment of a vehicular lamp according to the present invention will be described with reference to the drawings. In FIG. 1A, a vehicular lamp 10 comprises:
A housing 11 having a front opening 11a, a lens 12 mounted on the housing 11 so as to close the front opening 11a, and a valve 13 mounted on the housing 11
And an inner housing 14 having a reflection surface 14a for reflecting the illumination light beam emitted from the bulb 13 toward the lens 12 side. An engaging groove 11b is formed in the housing 11 along the opening edge of the front opening 11a and opens substantially in the same direction as the front opening 11a. The engaging groove 11b is formed of a hot melt material or the like. The sealing material 15 is filled. The lens 12 has, for example, a curved surface wrapping around from the front or rear surface of the vehicle body, and engages with the engagement groove 11b in a state of contact with the sealing material 15.
a is protrudingly provided. A blind ridge 12b having total reflection characteristics and extending in a direction intersecting with the leg 12a is formed on the rear surface of the lens 12 so as to cover a part of the engagement groove 11b. Further, the leg portion 12a of the lens 12 has a total reflection characteristic that extends in a direction intersecting the engaging portion of the engaging groove 11b of the leg portion 12a so as to cover another part of the engaging groove 11b. A blind ridge 12c is formed. The blind ridge 12b covers the sealing material 15 located outside the leg 12a. For example, a triangular prism at the tip or a reflective coating on the inner surface is used to receive a light flux from the outside. Total internal reflection, which results in lens 1
2, the seal material 15 is hard to see. As shown in FIGS. 2 and 3, the blind ridges 12b may be provided on the entire periphery of the vehicular lamp 10, but basically the seal member 15 is easily seen as described above. Since it is a part that wraps around the vehicle body, it may be formed in a range that includes this wrapped part. 2 and 3, reference numeral 16 denotes another lens fitted or joined to the lens 12, and reference numeral 17 denotes its bulb. The blind ridge 12c covers the sealing material 15 located inside the leg 12a. For example, the tip of the blind ridge 12c is formed as a triangular prism or the inner surface is coated with a reflective coating to receive a light flux from the outside. Total internal reflection, which results in lens 1
2, the seal material 15 is hard to see. Also in blind protrusion piece 12c, blind protrusion piece 12
What is necessary is just to form in the same range as b. The inner housing 14 is held by the housing 11, and separately from the reflecting surface 14a, the reflecting surface 1 on the design opposite to the part of the lens 12 which is turned around the vehicle body.
A skirt portion 14c having a portion 4b is integrally formed. One end 14d of the skirt portion 14c is
It is bent toward the side. In the above configuration, the lens 12 is externally provided.
Since the light fluxes P1 and P2 (line of sight) passing through and traveling toward the engaging groove 11b (sealing material 15) are reflected by the blind ridge 12b or the blind ridge 12c, the sealing material 15 is difficult to see. It has become. Also, blind ridges 12b, 12c
Due to its total reflection characteristics, the light reflects external incident light (for example, sunlight), and thus an apparent glossiness can be obtained by this reflected light flux. As described above, in the vehicular lamp according to the present invention, a blind having total reflection characteristics and extending in a direction intersecting the legs so as to cover the engagement grooves. By forming the protruding strip on the lens, not only the sealing material is hardly seen, but also the overall darkness can be eliminated, and the gloss can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a vehicular lamp according to an embodiment of the present invention, in which (A) is a cross-sectional view along line AA in FIG. 2, and (B) is an enlarged main part. It is sectional drawing. FIG. 2 is a front view of the vehicle lamp. FIG. 3 is a side view of the vehicle lamp. 4A and 4B show a conventional vehicle lamp, wherein FIG. 4A is a cross-sectional view of the vehicle lamp, and FIG. 4B is an enlarged cross-sectional view of a main part. DESCRIPTION OF SYMBOLS 10 ... vehicle lamp 11 ... housing 11a ... front opening 11b ... engaging groove 12 ... lens 12a ... leg 12b ... blind ridge 12c ... blind ridge 15 ... seal material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F21S 8/10

Claims (1)

(57) Claims 1. An engaging groove is formed in a housing along an opening edge of a front opening and opened substantially in the same direction as the front opening, and is filled in the engaging groove. in the sealing material and the engaging vehicle lamp which is held by the housing so that the lens which projects the leg portion engaged with engaging groove is closed the front opening while abutting, than the leg portion It extends in a direction intersecting with the leg portion so as to cover the sealing material located on the outside , and has a tip at three ends.
A vehicular lamp characterized in that a blind ridge having total reflection characteristics is formed on the lens by being a square prism .